(b) The decision of the Administrative Law Judge shall be limited to a determination of whether the respondent has committed a violation of section 12, or a repeated or willful violation of section 6 or section 7 of the Act, and the appropriateness of the penalty assessed by the Administrator. The Administrative Law Judge shall not render determinations on the legality of a regulatory provision or the constitutionality of a statutory provision.

(c) The decision of the Administrative Law Judge shall include a statement of findings and conclusions, with reasons and basis therefor, upon each material issue presented on the record. The decision shall also include an appropriate order which may affirm, deny, reverse, or modify, in whole or in part, the determination of the Administrator.